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+-- Thread: Powermatic 3520 - high pitch noise (/showthread.php?tid=7350852)
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Powermatic 3520 - high pitch noise - Strokes77 - 10-20-2019
New to me 1999 Powermatic 3520.
Runs well, seems to have full speed range, reverse, and enough torque.
But, when it is on it's slowest speed, there is a high pitch electrical sounding whine. It continues as speed increases, changes pitch, but still there.
Is this an issue? Other than annoyance? Or normal?
I am selling old lathe and setting this one up as my primary, want to make sure it's good to go before committing.
RE: Powermatic 3520 - high pitch noise - MidwestMan - 10-20-2019
I have a 3520A (which looks the same as yours) and I have no such issue AT ALL. All nice and quiet here. I don't know what is causing your noise/squeal.
RE: Powermatic 3520 - high pitch noise - Strokes77 - 10-20-2019
It's more of an electrical type hum. It does it even when spindel not turning. Just when speed is turned on a tiny bit.
RE: Powermatic 3520 - high pitch noise - Wipedout - 10-21-2019
Mine doesn't do that so it would concern me
RE: Powermatic 3520 - high pitch noise - stoppy - 10-21-2019
Mine is a "3520B" and has never done that. It would concern me.
RE: Powermatic 3520 - high pitch noise - Strokes77 - 10-21-2019
Here's a link to a video.
Any ideas?
https://youtu.be/4zi-58pIl-4
RE: Powermatic 3520 - high pitch noise - MidwestMan - 10-21-2019
I suspect an electronic component, like transistor, that is the culprit. May or may not be risky to use, but is annoying. (Fire risk, I meant)
RE: Powermatic 3520 - high pitch noise - MidwestMan - 10-21-2019
I'd call powermatic customer service and see if they'd work a repair/swap or something like that. If you're a dyi guy, I suppose you could try to locate the component and replace it yourself.
RE: Powermatic 3520 - high pitch noise - Joe K1 - 10-22-2019
My high frequency hearing is gone. What I hear sounded like bearing noise. Remove the belt from the motor pulley and operate to determine if there is spindle bearing noise.
RE: Powermatic 3520 - high pitch noise - Souperchicken - 10-22-2019
Hard to tell for sure but I think it's normal, I have the same lathe (mines a 2005) and it also whines, especially noticable at very slow speed. I think it's just the inverter drive electronics switching noise, maybe there's an inductor that whines or possibly the motor windings themselves. I wouldn't worry about it.